My Winterizing procedures on 340
Anthony, I only have a 340 but it is very similar to your 380 in the items needing winterizing. I winterize my boat every year but the season is shorter here and some folks do not winterize but keep some heat on in their boat. I do not like to take chances of the power going off. You probably haul your boat out and leave it on the hard for the winter in RI. but I leave mine in the water all year except for one year it was hauled out when I winterized it. I winterize my boat even though it is in North Carolina waters as we usually get a few days where the temp drops down to to the teens or 10 above zero F for a couple to a few days. A few years ago and last year the harbor froze over with a thin skim of ice and air temps have gotten down to 10 F degrees above zero. For my winterizing procedures, and I would expect yours to be similar, I empty my fresh water tank and drain the hot water tank (this is the most difficult to get the water out I never get all the water out) and put a couple or three gallons the pink stuff in the freshwater tank (propylene glycol) and pump it through all the water lines opening the faucets on galley sink, head sink and the shower out on the stern. Run the faucets til the pink stuff comes out. On my boat I put a little propylene glycol in each sink drain and then close the thru hull. If your boat is hauled out then opening the thru-hulls after haulout and then closing them should be enough for the sink drains. I also remove the hose from the elbow on the thruhull on the raw engine cooling water intake and put the hose in a jug of engine antifreeze and run the engine briefly to pump it through the manifold and exhaust. I keep the engine fuel tank topped off for the winter and add some biocide.I empty and clean the raw water strainer and replace the fuel filters and change the engine oil for winter storage. I put some pink stuff in the empty holding tank also make sure the mascerator gets winterized. I pump pump glycol through the seawater intake to the head again by removing the hose from the thruhull and inserting it in a cup of the pink stuff. I remove the hose from the thruhull for the air conditioner and pump some propylene glycol through the AC unit til it comes out the side of the hull to make sure all the water is out of the AC unit. I have been doing it this way for several years and no problems. They make different concentrations of the propylene glycol and the -100 deg. F. stuff costs more but if it is diluted with the remaining water in your tanks then it insures that you will not have a freezup. I use the -50 degree stuff for most things. The propylene glycol antifreeze is on sale at Boat US according to a flyer I got in the mail Friday. Good luck with your new 380! It would probably be good to make a checklist of the winterizing procedures.
